Add-extended_depth_of_focus_variance_projection

[StRigaud]

add two kernels:

• z_position_projection kernel
• extended_depth_of_focus_variance_projection

closes #426

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 14 lines in your changes missing coverage. Please review.

Project coverage is 45.93%. Comparing base (fa2d4d7) to head (0633f63).

Files with missing lines	Patch %	Lines
clic/src/tier1/z_position_projection_func.cpp	0.00%	8 Missing ⚠️
...r2/extended_depth_of_focus_variance_projection.cpp	0.00%	6 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #428      +/-   ##
==========================================
- Coverage   46.09%   45.93%   -0.16%     
==========================================
  Files         199      201       +2     
  Lines        4022     4036      +14     
  Branches     1844     1851       +7     
==========================================
  Hits         1854     1854              
- Misses        762      776      +14     
  Partials     1406     1406              

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